JPH0367852A - Paper discharge mechanism - Google Patents
Paper discharge mechanismInfo
- Publication number
- JPH0367852A JPH0367852A JP1205102A JP20510289A JPH0367852A JP H0367852 A JPH0367852 A JP H0367852A JP 1205102 A JP1205102 A JP 1205102A JP 20510289 A JP20510289 A JP 20510289A JP H0367852 A JPH0367852 A JP H0367852A
- Authority
- JP
- Japan
- Prior art keywords
- paper
- elastic member
- paper ejection
- paper discharge
- ejection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000013459 approach Methods 0.000 claims 1
- 230000037303 wrinkles Effects 0.000 abstract description 5
- 210000003127 knee Anatomy 0.000 abstract 1
- 238000011144 upstream manufacturing Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 108091008695 photoreceptors Proteins 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Landscapes
- Paper Feeding For Electrophotography (AREA)
- Delivering By Means Of Belts And Rollers (AREA)
- Separation, Sorting, Adjustment, Or Bending Of Sheets To Be Conveyed (AREA)
- Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、静電写真複写機やファクシミリなどの画像形
成装置や、それらの画像形成装置に連設されるソータ等
に装備される用紙排出機構に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an image forming apparatus such as an electrostatic photocopier or a facsimile machine, and a paper ejector installed in a sorter or the like connected to such an image forming apparatus. Regarding the mechanism.
上記の用紙排出機構として、遊端側が上向き勝手の状態
で配設された排紙トレイに画像形成後の用紙を排出させ
て、その排出された用紙を神祇トレイの傾斜下方に自重
滑落させることで、用紙後端を揃えさせるようにしたも
のがある。The above-mentioned paper ejection mechanism ejects the paper on which an image has been formed into a paper ejection tray arranged with the free end facing upward, and allows the ejected paper to slide under its own weight down the slope of the paper tray. , there is one that aligns the trailing edge of the paper.
か穎る構成の用紙排出機構において、第７図に仮想線で
示すように、排紙トレイ３１に排出される用紙ａの先端
が最初に排紙トレイ３１に接する点が排紙トレイ３１の
基部側であると、当該用紙先端が上向き勝手の排紙トレ
イ３１の受は面に直交気味に当接して排出抵抗が大きく
なり、当該用紙ａの中央部が中脹らみの状態で排出され
て表裏が反転したり、あるいは実線で示すように、用紙
先端部分下面の摺接抵抗が大きくなって、排紙トレイ３
１への用紙ａの排出不良を起こしたりする不都合がある
。In the paper ejecting mechanism having a folding configuration, as shown by the imaginary line in FIG. If it is on the side, the tray of the paper ejection tray 31 with the leading edge of the paper facing upward will come into contact with the surface perpendicularly, resulting in a large ejection resistance, and the paper a will be ejected with the center part bulging in the middle. If the front and back sides of the paper are reversed, or as shown by the solid line, the sliding resistance on the lower surface of the leading edge of the paper increases, causing the paper output tray to
There is an inconvenience that the paper a may be ejected incorrectly to the paper 1.
このように、用紙先端が最初に排紙トレイ３Ｉの基部側
に当接するのは主として用紙の腰の強さに起因するもの
で、例えば用紙ａ７！ｌ＜厚手で腰の強いものの場合は
、用紙先端が最初に排紙トレイ３１の遊端側に当接する
ので問題はない。In this way, the reason why the leading edge of the paper comes into contact with the base side of the paper ejection tray 3I first is mainly due to the stiffness of the paper. For example, paper A7! If l<thick and strong, there is no problem because the leading edge of the paper contacts the free end side of the paper discharge tray 31 first.
しかし、用紙ａが腰の弱い薄手のものの場合は、当該用
紙ａが排紙ローラ３２．３３の対から排出されると直ぐ
に腰折れ状態になって、用紙先端が排紙トレイ３１の基
部側に当接することから上記の不都合を生している。However, if the paper a is thin and has a weak stiffness, the paper a will bend at the waist as soon as it is ejected from the pair of paper ejection rollers 32 and 33, and the leading edge of the paper will hit the base side of the paper ejection tray 31. The above-mentioned inconvenience occurs due to the close contact.
そこで従来は、排紙トレイ３１に排出される用紙の腰を
強くするように用紙排出機構に工夫を凝らしている。Therefore, in the past, the paper ejection mechanism has been devised to strengthen the stiffness of the paper ejected to the paper ejection tray 31.
その一つに、実開昭４７−３１５５５号公報に見られ且
つ第６図に示すように、下方の排紙ローラ３３を両鍔付
きの構造にすると共に、この排紙ローラ３３の中央部に
上方に排紙ローラ３２を当接させて、排出される用紙ａ
を中方向で波打ち状態と威し、用紙ａの腰に強さを持た
せるようにしたものがある。One of them, as seen in Japanese Utility Model Application Publication No. 47-31555 and shown in FIG. The paper a that is ejected is brought into contact with the paper ejection roller 32 above.
There is one in which paper a is made to have a wavy state in the middle direction to give strength to the stiffness of paper a.
か＼る構成によれば、用紙ａの腰が強くなって排紙トレ
イに対する用紙先端の到達距離が長くなり、即ち、用紙
先端が最初に排紙Ｉ・レイに接する点が排紙トレイの遊
端側になり、上記の不都合を効果的に解消できるのであ
るが、」二下の排紙ロウ３２．３３対の部分で用紙ａが
局部的に曲げられることから、用紙ａが厚手であるか薄
手であるかを問わず当該曲げ部分に縦皺が発生し易い欠
点があった。According to this configuration, the stiffness of the paper a becomes stronger, and the distance that the leading edge of the paper reaches with respect to the paper ejection tray becomes longer. In other words, the point where the leading edge of the paper first contacts the ejected paper I/ray is located at the point where the paper ejection tray is loose. However, since paper a is locally bent at the lower pair of paper ejection rows 32 and 33, paper a is thick. Regardless of whether it is thin or not, there is a drawback that vertical wrinkles are likely to occur in the bent portion.
本発明は、か＼る実情に鑑みて威されたものであって、
極めて合理的な改良技術によって、」二記縦皺を生しさ
せることなく、用紙先端を排紙トレイの′ＪｊＩｌ端側
に当接させ得るようにした用紙排出機構を提供すること
を目的としている。The present invention was developed in view of the actual situation, and
The object of the present invention is to provide a paper ejecting mechanism that allows the leading edge of the paper to come into contact with the end side of the paper ejecting tray without producing vertical wrinkles using extremely rational improved technology. .
Ｃ問題点を解決するための手段〕
上記の目的を達成するに至った本発明による用紙排出機
構は、上下で一対の２紹の排紙ローラ間に位置させる状
態で当該排紙ローラ対のニノプ点近傍の下流側に、上縁
側が排紙方向下流側に撓み変形可能な弾性部材を排紙経
路を横断さセて設番Ｊると共に、当該弾性部祠の少なく
とも前記排紙経路を横断する部分を含む上面部分を」二
様（！ＩＩ ＤＩど排紙方向下流側に傾斜させた点に特
徴がある。Means for Solving Problem C] The paper ejecting mechanism according to the present invention that has achieved the above object is arranged so that the paper ejecting mechanism of the pair of paper ejecting rollers is positioned between a pair of upper and lower paper ejecting rollers. On the downstream side near the point, an elastic member whose upper edge side can be bent and deformed downstream in the paper ejection direction is installed so as to cross the paper ejection path, and at least cross the paper ejection path of the elastic member. It is distinctive in that the top surface including the ``2'' (!II DI) section is inclined downstream in the paper ejection direction.
上記の特徴構成によれば、排紙ローラ対によって排出さ
れる用紙は、当該排紙ローラ対から排出されて直ぐに排
紙経路を横断する弾性部材を乗り越し、かつ、当該用紙
が薄手で腰の弱いものの場合は、弾性部材によって用紙
下面側が持ち上げられることで山なりになり、用紙の腰
が強化された状態で排紙トレイに排出される。According to the characteristic structure described above, the paper ejected by the paper ejection roller pair immediately passes over the elastic member that crosses the paper ejection path after being ejected from the paper ejection roller pair, and the paper is thin and has a weak stiffness. In the case of paper, the bottom side of the paper is lifted by the elastic member, forming a heap, and the paper is ejected to the paper ejection tray with its stiffness strengthened.
一方、用紙が厚手で腰の強いものの場合は、前記弾性部
材が用紙の腰の強さに負けて排紙方向下流側に撓み変形
し、用紙かや＼山なりになる状態で排紙トレイに排出さ
れる。On the other hand, if the paper is thick and stiff, the elastic member will bend and deform in the downstream direction in the paper ejection direction due to the stiffness of the paper, and the paper will be delivered to the paper ejection tray in a state where it forms a heap/heap. It is discharged.
以下、本発明の実施例を図面に基づいて説明する。 Embodiments of the present invention will be described below based on the drawings.
第３図は画像形成装置の一例の静電写真複写機を示し、
原稿台１と原稿押え２を上部に備えた装置本体３に感光
体４を横架すると共に、当該感光体４のまわりに、帯電
装置５、現像装置６、転写装置７、用紙分離装置８、ク
リーニング装置９を配置し、かつ、前記装置本体３の上
部空間に光学系移動式の露光装置１０を設けると共に、
カセソ１−ケース１１内の用紙ａを前記転写装置７に搬
送する給紙搬送装置１２と、転写・分＃後の用紙ａを定
着装置１３に搬送する排紙搬送装置１４、および、定着
後の用紙ａを遊端側が上向き勝手の排紙トレイ１５に排
出する用紙排出機構１６を設けて成る。FIG. 3 shows an electrostatographic copying machine as an example of an image forming apparatus,
A photoreceptor 4 is horizontally mounted on an apparatus main body 3 having a document table 1 and a document holder 2 on the upper part, and a charging device 5, a developing device 6, a transfer device 7, a paper separation device 8, A cleaning device 9 is disposed, and an exposure device 10 with a movable optical system is provided in the upper space of the device main body 3.
A paper feed conveyance device 12 that conveys the paper a in the case 11 of the cassette 1 to the transfer device 7, a paper discharge conveyance device 14 that conveys the paper a after transfer and transfer to the fixing device 13, and A paper ejection mechanism 16 is provided for ejecting the paper a to a paper ejection tray 15 with the free end facing upward.
用紙排出機構１６は次のように構成されている。The paper ejection mechanism 16 is configured as follows.
即ち、第１図および第２図に示すように、一端に人力ギ
ャＧを設けた駆動軸１７を、排紙口１８近傍の前後側板
１９．１９にわたって軸架すると共に、この駆動軸１８
に所定間隔を隔てて複数個（４個を図示するも個数は不
問である。〉の下部側排紙ローラ２０を設ける一方、前
記駆動軸１８よりも上方部位の前後側板１９．１９にわ
たって保持部材２１を架設し、かつ、遊端側のブラケッ
ト２２に上部側の排紙ローラ２３を枢着したローラ取り
付は部材２４を、それの排紙ローラ２３を下部側の排紙
ローラ２０に付勢当接させて保持部材２１に取り付けで
ある。That is, as shown in FIGS. 1 and 2, a drive shaft 17 provided with a manual gear G at one end is mounted across front and rear side plates 19 and 19 near the paper discharge port 18, and this drive shaft 18
A plurality of lower paper ejection rollers 20 (four are shown, but the number is not limited) are provided at predetermined intervals, and a holding member is provided across the front and rear side plates 19 and 19 above the drive shaft 18. 21, and the upper paper ejection roller 23 is pivotally mounted on the bracket 22 on the free end side. It is attached to the holding member 21 by making them come into contact with each other.
そして、前記排紙ローラ２０．２３による排紙経路Ｐを
横断させる状態で且つ中央２組の排紙ローラ２０．２３
間に位置させる状態で、−Ｌ縁側が排紙方向下流側に撓
み変形可能な弾性部材２６を後側板２５の内面側に設け
ると共に、当該弾性部材２６を前記排紙経路Ｙ〕のやＸ
１ζ方部位で屈曲させて、当該弾性部材２６の前記排紙
経路Ｐを横断する部分を含む」−方部分すを」二様側ほ
ど排紙方向下流側に傾斜させである。Then, the two central sets of paper ejection rollers 20.23 are in a state where the paper ejection path P is crossed by the paper ejection rollers 20.23.
An elastic member 26 whose -L edge side can be bent and deformed downstream in the paper discharge direction is provided on the inner surface side of the rear plate 25, and the elastic member 26 is connected to the paper discharge path Y] and X.
The elastic member 26 is bent at the 1ζ side portion, and the ``-'' portion including the portion of the elastic member 26 that crosses the sheet discharge path P is inclined toward the downstream side in the sheet discharge direction.
尚、上記の弾性部＋、ｔ ２６は、例えばポリエステル
フィルム等のシートから成り、その上縁の両角部を滑ら
かに面取り加工しである。The above-mentioned elastic part +, t26 is made of a sheet such as a polyester film, and both corners of its upper edge are smoothly chamfered.
ｊ二記の構成によれば、複数組の排紙に１−ラ２０２３
対によって排紙口】８から排出された用紙ａは、排紙ロ
ーラ２０．２３から排出されて直くに、その中央部が弾
性部材２６を乗り越すことになり、而して第４図および
第５図に示すように、前記弾性部組２Ｇを乗り越した用
紙ａが薄手で腰の弱いものの場合は、その中央下面側が
弾性部材２６で持ち上げられて中央部が山なりの状態に
なり、当該用紙ａの腰が強化されると共に、前記排紙ロ
ーラ２０．２３によるニソブ点から排紙方向下流側に少
し離れた筒所が弾性部材２６で支持されることが相俟っ
て、用紙先端が上向き勝手の排紙１−レイ１５の遊端側
に接する状態で排ｗｉ ＋−レイ１５に排出される。According to the configuration described in j.2, 1-ra 2023 is used for multiple sets of paper ejection.
The paper a discharged from the paper discharge port 8 is discharged from the paper discharge roller 20.23, and immediately its central portion passes over the elastic member 26, and as shown in FIGS. 4 and 5. As shown in the figure, if the paper a that has passed through the elastic member assembly 2G is thin and weak, the lower center side of the paper is lifted by the elastic member 26 and the center becomes a mountain, and the paper a The stiffness of the paper is strengthened, and the cylindrical position of the paper ejection roller 20.23, which is located a little downstream in the paper ejection direction, is supported by the elastic member 26, so that the leading edge of the paper is directed upward. The ejected paper 1 is ejected to the ejection wi + - lay 15 in a state in contact with the free end side of the ejection lay 15.
一方、用紙ａが厚手で腰の強いものの場合１ｉ、用紙ａ
の腰の強さに負ので前記弾性部材２６が排紙方向下流側
に撓み変形し、而して、用紙中央かや一山なりになるも
のの当該用紙ａに無理な曲げ力がイ」与されることなく
、その先端が上向き勝手の排紙トレイ１５の遊端側に接
する状態で排紙トレイ１５に排出される。On the other hand, if paper a is thick and strong, 1i, paper a
Since the elastic member 26 has a negative stiffness, the elastic member 26 bends and deforms toward the downstream side in the paper ejection direction, and although the paper becomes a heap at the center, an unreasonable bending force is applied to the paper a. The sheet is discharged onto the sheet discharge tray 15 with its leading end in contact with the free end side of the sheet discharge tray 15 which faces upward.
即ち、用紙ａが薄手のものであろうと１１手のものであ
ろうと、その用紙先端が最初に排紙トレイ１５に接する
点が排紙ｌ・レイ１５の遊端側になり、しかも、排紙ロ
ーラ２０．２３とは離れた箇所に弾性部材２６を設けて
用紙ａを山なりにするので、当該用１ｇａに縦皺を生し
させるような無理な力がかからず、前記排紙１−レイ１
５に対する用紙ａの排出を所定通り整然と行わせること
ができる。That is, regardless of whether the paper a is thin or thin, the point where the leading edge of the paper first contacts the paper ejection tray 15 is the free end side of the paper ejection tray 15, and Since the elastic member 26 is provided at a location away from the rollers 20 and 23 to form a pile of paper a, no excessive force is applied to the paper 1 ga that would cause vertical wrinkles, and the discharged paper 1- Ray 1
The paper a can be ejected in a predetermined manner in an orderly manner.
尚、実施例では、前記弾性部材２６の上縁の両角部を面
取り加工しているが、例えばＢ５サイズやＡ４ザイズな
ど一般に使用頻度が高いとされる用紙を対象にして、そ
の用紙ａが山なりになったときの湾曲面に沿わせるよう
に、前記弾性部材２６の上縁の全体を面取り加工する構
成とするもよい。In the embodiment, both corners of the upper edge of the elastic member 26 are chamfered. The entire upper edge of the elastic member 26 may be chamfered so as to follow the curved surface of the elastic member 26.
また実施例では、静電写真複写機を本発明による用紙排
出機構の実施対象としたが、複写機の排紙口１８に連設
されるソーク−やファクシミリ等を本発明の対象にして
実施可能である。Furthermore, in the embodiment, the paper ejection mechanism according to the present invention was applied to an electrostatic photocopying machine, but the invention can also be applied to a soak machine connected to the paper ejection port 18 of a copying machine, a facsimile machine, etc. It is.
以」二説明したように本発明の用紙排出機構によれば、
排紙ローラ対のニノプ点近傍の下流側に弾性部材を設け
るだけの極めて簡単な改良によって、用紙に縦皺を生し
させるようなことなく、用紙先端を」二向き勝手の排紙
トレイの遊端側に当接させることができるようになり、
延いては、排紙トレイに対する用紙の排出を所定通り整
然と行わせられるようになったのである。As explained above, according to the paper ejection mechanism of the present invention,
By simply installing an elastic member on the downstream side of the pair of paper ejecting rollers near the tip point, the leading edge of the paper can be easily removed from the playback of the two-way paper ejecting tray without causing vertical wrinkles in the paper. Now it can be brought into contact with the end side,
As a result, the paper can now be ejected to the paper ejection tray in a predetermined orderly manner.
第１図は用紙排出機構の縦断側面図、第２図は用紙排出
機構の背面図、第３図は静電写真複写機の概略縦断側面
図、第４図および第５図はそれぞれ排紙説明図である。
第６図は従来例の用紙排出機構の一部を示す説明図、第
７図も従来例の用紙排出機構における排紙の説明図であ
る。
１５・・・排紙トレイ、２０．２３・・・排紙ローラ、
２６・・弾性部材、Ｐ・・・排紙経路。
出 願 人 三田工業株式会社
代 理 人 弁理士 藤木英夫
特開平３
６７８５２ （４）Fig. 1 is a longitudinal side view of the paper ejection mechanism, Fig. 2 is a rear view of the paper ejection mechanism, Fig. 3 is a schematic longitudinal side view of the electrostatographic copying machine, and Figs. 4 and 5 are explanations of paper ejection. It is a diagram. FIG. 6 is an explanatory diagram showing a part of a conventional paper ejection mechanism, and FIG. 7 is also an explanatory diagram of paper ejection in the conventional paper ejection mechanism. 15... Paper ejection tray, 20.23... Paper ejection roller,
26...Elastic member, P...Paper discharge path. Applicant Sanda Kogyo Co., Ltd. Agent Patent Attorney Hideo Fujiki JP-A-3 67852 (4)
Claims (1)
像形成後の用紙を排出させるための用紙排出機構であっ
て、上下で一対の２組の排紙ローラ間に位置させる状態
で当該排紙ローラ対のニップ点近傍の下流側に、上縁側
が排紙方向下流側に撓み変形可能な弾性部材を排紙経路
を横断させて設けると共に、当該弾性部材の少なくとも
前記排紙経路を横断する部分を含む上面部分を上縁側ほ
ど排紙方向下流側に傾斜させてあることを特徴とする用
紙排出機構。A paper ejection mechanism for ejecting paper on which an image has been formed to a paper ejection tray arranged with the free end facing upward. An elastic member whose upper edge side is bendable and deformable toward the downstream side in the paper ejection direction is provided on the downstream side near the nip point of the pair of paper ejection rollers so as to cross the paper ejection path, and at least the elastic member crosses the paper ejection path. A paper ejecting mechanism characterized in that an upper surface portion including a portion where the paper is ejected is inclined toward the downstream side in the paper ejecting direction as the upper edge side approaches.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1205102A JPH0367852A (en) | 1989-08-08 | 1989-08-08 | Paper discharge mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1205102A JPH0367852A (en) | 1989-08-08 | 1989-08-08 | Paper discharge mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0367852A true JPH0367852A (en) | 1991-03-22 |
Family
ID=16501452
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1205102A Pending JPH0367852A (en) | 1989-08-08 | 1989-08-08 | Paper discharge mechanism |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0367852A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6698752B1 (en) | 1999-03-15 | 2004-03-02 | Kyocera Mita Corporation | Sheet transport device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6223259B2 (en) * | 1979-01-31 | 1987-05-22 | Uchu Kaihatsu Jigyodan |
-
1989
- 1989-08-08 JP JP1205102A patent/JPH0367852A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6223259B2 (en) * | 1979-01-31 | 1987-05-22 | Uchu Kaihatsu Jigyodan |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6698752B1 (en) | 1999-03-15 | 2004-03-02 | Kyocera Mita Corporation | Sheet transport device |
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